Tree stand



FIG. 1 is a perspective view of a tree stand showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a left side elevational view with the right side being a mirror image thereof; and,

FIG. 6 is a bottom view thereof.

The broken line showing of a spike attached to the tree receiving portion of the device in FIG. 4 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a tree stand, as shown and described. 